Complete each second sentence using the word given, so that it has a similar meaning to the first sentence. Write between two and five words

Ex5. Complete each second sentence using the word given, so that it has a similar
meaning to the first sentence. Write between two and five words.
1. I expect Adrian did a lot of revision. (must)
=> Adrian _ a lot of revision.
2. I don't believe that Jim stole the money. (can't)
=> Jim_ the money.
3. It's possible that I have made a mistake. (could)
=> I _ a mistake.
4. There's a chance that someone saw us. (may)
=> Someone _ us
5. It's possible that Tim hasn't arrived yet. (might)
=> Tim_ yet.
6. I'm sure that Irene wasn't at the party because she was ill. (have)
=> Irene ___ at the party because she was ill.